Question

Find the area of rectangle whose length is 10 cm and breath 50 cm
find cost of fencing ₹20 per m​

Answer 1

Length =10cm

Breadth = 50cm

Area = (10×50)cm^2

= 500cm^2

Now for finding the cost of fencing we need to find perimeter of rectangle..

So perimeter = 2×(10+50)cm

= 2× 60cm

=120cm = 1.2m( as cost of fencing we need to find per m so converting it into m)

Cost of fencing 1m = Rs. 20

Cost of fencing 1.2 m = Rs. (1.2×20)

= Rs. 24

Answer :- The area of rectangle is 500cm^2 and the cost of fencing is Rs. 24

Answer 2

Given:

✰ Length of the rectangle = 10 cm

✰ Breadth of the rectangle = 50 cm

To find:

✠ The area of rectangle.

✠ The cost of fencing ₹20 per m.

Solution:

We will find the area of triangle by using formula. Putting the values in the formula and then doing the required calculations.

Let's find out...✧

✭ Area of rectangle = l × b ✭

Where,

• l is the length of the rectangle.
• b is the breadth of the rectangle.

➛ Area of rectangle = 10 × 50

➛ Area of rectangle = 500 cm²

∴ The area of rectangle = 500 cm²

Now, we will first find out the perimeter of triangle by using formula. Putting the values in the formula and then doing the required calculations. After that we know the cost of fencing per m is ₹20, so we will find the cost of fencing according to its perimeter i.e, total length of its boundary.

Let's find out...✧

✭ Perimeter of a rectangle = 2( l + b ) ✭

Where,

• l is the length of the rectangle.
• b is the breadth of the rectangle.

➛ Perimeter of a rectangle = 2( 10 + 50 )

➛ Perimeter of a rectangle = 2 × 60

➛ Perimeter of a rectangle = 120 cm

As we are provided with the cost of fencing per m, so we will keep in mind that the units are same i.e, of same nature else we will get wrong calculations.

➛ 1 cm = 1/100 m

➛ 120 cm = 120/100 m

➛ 12/10 m

➛ 1.2 m

Now,

➤ The cost of fencing per m = ₹20

➤ The cost of fencing per 1.2 m = ₹20 × 1.2

➤ The cost of fencing per 1.2 m = ₹24

∴ The total cost of fencing = ₹24

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